Return to man_html.c CVS log

Up to [cvsweb.bsd.lv] / mandoc

Completely delete the buf field of struct html and all the buf*()
interfaces.  Such a static buffer was a bad idea in the first place,
causing unfixable truncation that was only prevented by triggering
an assertion failure.  Instead, let the small number of remaining
users allocate and free their own, temporary dynamic buffers,
or for the case of .Xr and .In, pass the original data to be
assembled in print_otag().

/*	$Id: man_html.c,v 1.123 2017/01/17 15:32:44 schwarze Exp $ */
/*
 * Copyright (c) 2008-2012, 2014 Kristaps Dzonsons <kristaps@bsd.lv>
 * Copyright (c) 2013, 2014, 2015, 2017 Ingo Schwarze <schwarze@openbsd.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
#include "config.h"

#include <sys/types.h>

#include <assert.h>
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "mandoc_aux.h"
#include "roff.h"
#include "man.h"
#include "out.h"
#include "html.h"
#include "main.h"

/* TODO: preserve ident widths. */
/* FIXME: have PD set the default vspace width. */

#define	INDENT		  5

#define	MAN_ARGS	  const struct roff_meta *man, \
			  const struct roff_node *n, \
			  struct mhtml *mh, \
			  struct html *h

struct	mhtml {
	int		  fl;
#define	MANH_LITERAL	 (1 << 0) /* literal context */
};

struct	htmlman {
	int		(*pre)(MAN_ARGS);
	int		(*post)(MAN_ARGS);
};

static	void		  print_bvspace(struct html *,
				const struct roff_node *);
static	void		  print_man_head(MAN_ARGS);
static	void		  print_man_nodelist(MAN_ARGS);
static	void		  print_man_node(MAN_ARGS);
static	int		  a2width(const struct roff_node *,
				struct roffsu *);
static	int		  man_B_pre(MAN_ARGS);
static	int		  man_HP_pre(MAN_ARGS);
static	int		  man_IP_pre(MAN_ARGS);
static	int		  man_I_pre(MAN_ARGS);
static	int		  man_OP_pre(MAN_ARGS);
static	int		  man_PP_pre(MAN_ARGS);
static	int		  man_RS_pre(MAN_ARGS);
static	int		  man_SH_pre(MAN_ARGS);
static	int		  man_SM_pre(MAN_ARGS);
static	int		  man_SS_pre(MAN_ARGS);
static	int		  man_UR_pre(MAN_ARGS);
static	int		  man_alt_pre(MAN_ARGS);
static	int		  man_br_pre(MAN_ARGS);
static	int		  man_ign_pre(MAN_ARGS);
static	int		  man_in_pre(MAN_ARGS);
static	int		  man_literal_pre(MAN_ARGS);
static	void		  man_root_post(MAN_ARGS);
static	void		  man_root_pre(MAN_ARGS);

static	const struct htmlman mans[MAN_MAX] = {
	{ man_br_pre, NULL }, /* br */
	{ NULL, NULL }, /* TH */
	{ man_SH_pre, NULL }, /* SH */
	{ man_SS_pre, NULL }, /* SS */
	{ man_IP_pre, NULL }, /* TP */
	{ man_PP_pre, NULL }, /* LP */
	{ man_PP_pre, NULL }, /* PP */
	{ man_PP_pre, NULL }, /* P */
	{ man_IP_pre, NULL }, /* IP */
	{ man_HP_pre, NULL }, /* HP */
	{ man_SM_pre, NULL }, /* SM */
	{ man_SM_pre, NULL }, /* SB */
	{ man_alt_pre, NULL }, /* BI */
	{ man_alt_pre, NULL }, /* IB */
	{ man_alt_pre, NULL }, /* BR */
	{ man_alt_pre, NULL }, /* RB */
	{ NULL, NULL }, /* R */
	{ man_B_pre, NULL }, /* B */
	{ man_I_pre, NULL }, /* I */
	{ man_alt_pre, NULL }, /* IR */
	{ man_alt_pre, NULL }, /* RI */
	{ man_br_pre, NULL }, /* sp */
	{ man_literal_pre, NULL }, /* nf */
	{ man_literal_pre, NULL }, /* fi */
	{ NULL, NULL }, /* RE */
	{ man_RS_pre, NULL }, /* RS */
	{ man_ign_pre, NULL }, /* DT */
	{ man_ign_pre, NULL }, /* UC */
	{ man_ign_pre, NULL }, /* PD */
	{ man_ign_pre, NULL }, /* AT */
	{ man_in_pre, NULL }, /* in */
	{ man_ign_pre, NULL }, /* ft */
	{ man_OP_pre, NULL }, /* OP */
	{ man_literal_pre, NULL }, /* EX */
	{ man_literal_pre, NULL }, /* EE */
	{ man_UR_pre, NULL }, /* UR */
	{ NULL, NULL }, /* UE */
	{ man_ign_pre, NULL }, /* ll */
};


/*
 * Printing leading vertical space before a block.
 * This is used for the paragraph macros.
 * The rules are pretty simple, since there's very little nesting going
 * on here.  Basically, if we're the first within another block (SS/SH),
 * then don't emit vertical space.  If we are (RS), then do.  If not the
 * first, print it.
 */
static void
print_bvspace(struct html *h, const struct roff_node *n)
{

	if (n->body && n->body->child)
		if (n->body->child->type == ROFFT_TBL)
			return;

	if (n->parent->type == ROFFT_ROOT || n->parent->tok != MAN_RS)
		if (NULL == n->prev)
			return;

	print_paragraph(h);
}

void
html_man(void *arg, const struct roff_man *man)
{
	struct mhtml	 mh;
	struct html	*h;
	struct tag	*t, *tt;

	memset(&mh, 0, sizeof(mh));
	h = (struct html *)arg;

	if ( ! (HTML_FRAGMENT & h->oflags)) {
		print_gen_decls(h);
		t = print_otag(h, TAG_HTML, "");
		tt = print_otag(h, TAG_HEAD, "");
		print_man_head(&man->meta, man->first, &mh, h);
		print_tagq(h, tt);
		print_otag(h, TAG_BODY, "");
		print_otag(h, TAG_DIV, "c", "mandoc");
	} else
		t = print_otag(h, TAG_DIV, "c", "mandoc");

	print_man_nodelist(&man->meta, man->first, &mh, h);
	print_tagq(h, t);
	putchar('\n');
}

static void
print_man_head(MAN_ARGS)
{
	char	*cp;

	print_gen_head(h);
	mandoc_asprintf(&cp, "%s(%s)", man->title, man->msec);
	print_otag(h, TAG_TITLE, "");
	print_text(h, cp);
	free(cp);
}

static void
print_man_nodelist(MAN_ARGS)
{

	while (n != NULL) {
		print_man_node(man, n, mh, h);
		n = n->next;
	}
}

static void
print_man_node(MAN_ARGS)
{
	int		 child;
	struct tag	*t;

	child = 1;
	t = h->tags.head;

	switch (n->type) {
	case ROFFT_ROOT:
		man_root_pre(man, n, mh, h);
		break;
	case ROFFT_TEXT:
		if ('\0' == *n->string) {
			print_paragraph(h);
			return;
		}
		if (n->flags & NODE_LINE && (*n->string == ' ' ||
		    (n->prev != NULL && mh->fl & MANH_LITERAL &&
		     ! (h->flags & HTML_NONEWLINE))))
			print_otag(h, TAG_BR, "");
		print_text(h, n->string);
		return;
	case ROFFT_EQN:
		if (n->flags & NODE_LINE)
			putchar('\n');
		print_eqn(h, n->eqn);
		break;
	case ROFFT_TBL:
		/*
		 * This will take care of initialising all of the table
		 * state data for the first table, then tearing it down
		 * for the last one.
		 */
		print_tbl(h, n->span);
		return;
	default:
		/*
		 * Close out scope of font prior to opening a macro
		 * scope.
		 */
		if (HTMLFONT_NONE != h->metac) {
			h->metal = h->metac;
			h->metac = HTMLFONT_NONE;
		}

		/*
		 * Close out the current table, if it's open, and unset
		 * the "meta" table state.  This will be reopened on the
		 * next table element.
		 */
		if (h->tblt) {
			print_tblclose(h);
			t = h->tags.head;
		}
		if (mans[n->tok].pre)
			child = (*mans[n->tok].pre)(man, n, mh, h);
		break;
	}

	if (child && n->child)
		print_man_nodelist(man, n->child, mh, h);

	/* This will automatically close out any font scope. */
	print_stagq(h, t);

	switch (n->type) {
	case ROFFT_ROOT:
		man_root_post(man, n, mh, h);
		break;
	case ROFFT_EQN:
		break;
	default:
		if (mans[n->tok].post)
			(*mans[n->tok].post)(man, n, mh, h);
		break;
	}
}

static int
a2width(const struct roff_node *n, struct roffsu *su)
{

	if (n->type != ROFFT_TEXT)
		return 0;
	if (a2roffsu(n->string, su, SCALE_EN))
		return 1;

	return 0;
}

static void
man_root_pre(MAN_ARGS)
{
	struct tag	*t, *tt;
	char		*title;

	assert(man->title);
	assert(man->msec);
	mandoc_asprintf(&title, "%s(%s)", man->title, man->msec);

	t = print_otag(h, TAG_TABLE, "c", "head");
	print_otag(h, TAG_TBODY, "");
	tt = print_otag(h, TAG_TR, "");

	print_otag(h, TAG_TD, "c", "head-ltitle");
	print_text(h, title);
	print_stagq(h, tt);

	print_otag(h, TAG_TD, "c", "head-vol");
	if (NULL != man->vol)
		print_text(h, man->vol);
	print_stagq(h, tt);

	print_otag(h, TAG_TD, "c", "head-rtitle");
	print_text(h, title);
	print_tagq(h, t);
	free(title);
}

static void
man_root_post(MAN_ARGS)
{
	struct tag	*t, *tt;

	t = print_otag(h, TAG_TABLE, "c", "foot");
	tt = print_otag(h, TAG_TR, "");

	print_otag(h, TAG_TD, "c", "foot-date");
	print_text(h, man->date);
	print_stagq(h, tt);

	print_otag(h, TAG_TD, "c", "foot-os");
	if (man->os)
		print_text(h, man->os);
	print_tagq(h, t);
}


static int
man_br_pre(MAN_ARGS)
{
	struct roffsu	 su;

	SCALE_VS_INIT(&su, 1);

	if (MAN_sp == n->tok) {
		if (NULL != (n = n->child))
			if ( ! a2roffsu(n->string, &su, SCALE_VS))
				su.scale = 1.0;
	} else
		su.scale = 0.0;

	print_otag(h, TAG_DIV, "suh", &su);

	/* So the div isn't empty: */
	print_text(h, "\\~");

	return 0;
}

static int
man_SH_pre(MAN_ARGS)
{
	if (n->type == ROFFT_BLOCK) {
		mh->fl &= ~MANH_LITERAL;
		print_otag(h, TAG_DIV, "c", "section");
		return 1;
	} else if (n->type == ROFFT_BODY)
		return 1;

	print_otag(h, TAG_H1, "");
	return 1;
}

static int
man_alt_pre(MAN_ARGS)
{
	const struct roff_node	*nn;
	int		 i, savelit;
	enum htmltag	 fp;
	struct tag	*t;

	if ((savelit = mh->fl & MANH_LITERAL))
		print_otag(h, TAG_BR, "");

	mh->fl &= ~MANH_LITERAL;

	for (i = 0, nn = n->child; nn; nn = nn->next, i++) {
		t = NULL;
		switch (n->tok) {
		case MAN_BI:
			fp = i % 2 ? TAG_I : TAG_B;
			break;
		case MAN_IB:
			fp = i % 2 ? TAG_B : TAG_I;
			break;
		case MAN_RI:
			fp = i % 2 ? TAG_I : TAG_MAX;
			break;
		case MAN_IR:
			fp = i % 2 ? TAG_MAX : TAG_I;
			break;
		case MAN_BR:
			fp = i % 2 ? TAG_MAX : TAG_B;
			break;
		case MAN_RB:
			fp = i % 2 ? TAG_B : TAG_MAX;
			break;
		default:
			abort();
		}

		if (i)
			h->flags |= HTML_NOSPACE;

		if (TAG_MAX != fp)
			t = print_otag(h, fp, "");

		print_man_node(man, nn, mh, h);

		if (t)
			print_tagq(h, t);
	}

	if (savelit)
		mh->fl |= MANH_LITERAL;

	return 0;
}

static int
man_SM_pre(MAN_ARGS)
{
	print_otag(h, TAG_SMALL, "");
	if (MAN_SB == n->tok)
		print_otag(h, TAG_B, "");
	return 1;
}

static int
man_SS_pre(MAN_ARGS)
{
	if (n->type == ROFFT_BLOCK) {
		mh->fl &= ~MANH_LITERAL;
		print_otag(h, TAG_DIV, "c", "subsection");
		return 1;
	} else if (n->type == ROFFT_BODY)
		return 1;

	print_otag(h, TAG_H2, "");
	return 1;
}

static int
man_PP_pre(MAN_ARGS)
{

	if (n->type == ROFFT_HEAD)
		return 0;
	else if (n->type == ROFFT_BLOCK)
		print_bvspace(h, n);

	return 1;
}

static int
man_IP_pre(MAN_ARGS)
{
	const struct roff_node	*nn;

	if (n->type == ROFFT_BODY) {
		print_otag(h, TAG_DD, "");
		return 1;
	} else if (n->type != ROFFT_HEAD) {
		print_otag(h, TAG_DL, "");
		return 1;
	}

	/* FIXME: width specification. */

	print_otag(h, TAG_DT, "");

	/* For IP, only print the first header element. */

	if (MAN_IP == n->tok && n->child)
		print_man_node(man, n->child, mh, h);

	/* For TP, only print next-line header elements. */

	if (MAN_TP == n->tok) {
		nn = n->child;
		while (NULL != nn && 0 == (NODE_LINE & nn->flags))
			nn = nn->next;
		while (NULL != nn) {
			print_man_node(man, nn, mh, h);
			nn = nn->next;
		}
	}

	return 0;
}

static int
man_HP_pre(MAN_ARGS)
{
	struct roffsu	 sum, sui;
	const struct roff_node *np;

	if (n->type == ROFFT_HEAD)
		return 0;
	else if (n->type != ROFFT_BLOCK)
		return 1;

	np = n->head->child;

	if (np == NULL || !a2width(np, &sum))
		SCALE_HS_INIT(&sum, INDENT);

	sui.unit = sum.unit;
	sui.scale = -sum.scale;

	print_bvspace(h, n);
	print_otag(h, TAG_DIV, "csului", "spacer", &sum, &sui);
	return 1;
}

static int
man_OP_pre(MAN_ARGS)
{
	struct tag	*tt;

	print_text(h, "[");
	h->flags |= HTML_NOSPACE;
	tt = print_otag(h, TAG_SPAN, "c", "opt");

	if (NULL != (n = n->child)) {
		print_otag(h, TAG_B, "");
		print_text(h, n->string);
	}

	print_stagq(h, tt);

	if (NULL != n && NULL != n->next) {
		print_otag(h, TAG_I, "");
		print_text(h, n->next->string);
	}

	print_stagq(h, tt);
	h->flags |= HTML_NOSPACE;
	print_text(h, "]");
	return 0;
}

static int
man_B_pre(MAN_ARGS)
{
	print_otag(h, TAG_B, "");
	return 1;
}

static int
man_I_pre(MAN_ARGS)
{
	print_otag(h, TAG_I, "");
	return 1;
}

static int
man_literal_pre(MAN_ARGS)
{

	if (MAN_fi == n->tok || MAN_EE == n->tok) {
		print_otag(h, TAG_BR, "");
		mh->fl &= ~MANH_LITERAL;
	} else
		mh->fl |= MANH_LITERAL;

	return 0;
}

static int
man_in_pre(MAN_ARGS)
{
	print_otag(h, TAG_BR, "");
	return 0;
}

static int
man_ign_pre(MAN_ARGS)
{

	return 0;
}

static int
man_RS_pre(MAN_ARGS)
{
	struct roffsu	 su;

	if (n->type == ROFFT_HEAD)
		return 0;
	else if (n->type == ROFFT_BODY)
		return 1;

	SCALE_HS_INIT(&su, INDENT);
	if (n->head->child)
		a2width(n->head->child, &su);

	print_otag(h, TAG_DIV, "sul", &su);
	return 1;
}

static int
man_UR_pre(MAN_ARGS)
{
	n = n->child;
	assert(n->type == ROFFT_HEAD);
	if (n->child != NULL) {
		assert(n->child->type == ROFFT_TEXT);
		print_otag(h, TAG_A, "ch", "link-ext", n->child->string);
	}

	assert(n->next->type == ROFFT_BODY);
	if (n->next->child != NULL)
		n = n->next;

	print_man_nodelist(man, n->child, mh, h);

	return 0;
}